Spark and cinder arrester for locomotive smoke-stacks.



No; 707,063. Patented Aug. l2, I902. L. 0. LAURENT.

SPARK AND GINDER ABRESTER FOR LOCOMOTIVE SMOKE STAG-KS.

(Application filed Oct. 3, 1901.)

(No Model.)

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PAT NT LOUIS O. LAURENT, OF DENVER, COLORADO.

SPARK AND CINDER ARRESTER FOR LOCOMOTIVE SMOKE-STACKS.

SPECIFICATION forming part of Letters Patent No. 707,063, dated August12, 1902. Application filed October 3, 1901. Serial No. 77, 193- iNnmor'lp'.

To (tZZ whom, it may concern:

Be it known that I, LOUIS C. LAURENT, a citizen of the United States ofAmerica, residing at Denver, in the county of Arapahoe and State ofColorado, have invented certain new and useful Improvements in Spark andCinder Arresters for Locomotive Smoke- Stacks; and I do declare thefollowing to be a full, clear, and exact description of the invention,such as will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,and to the figures of reference marked thereon, which form a part ofthis specification.

My invention relates to improvements in spark and cinder arresters forsmoke-stacks, being especially applicable to locomotivestacks, my objectbeing to provide a device of this class which shall be simple inconstruction, economical in cost, reliable, durable, and efficient inuse; and to these ends my improvement consists of the features,arrangements, and combinations hereinafter described and claimed, all ofwhich will be fully understood by reference to the accompany-. ingdrawings, in which is illustrated an embodiment thereof.

In the drawings, Figure 1 is a vertical longitudinal section takenthrough a stack equipped with my improvements. Fig. 2 is an elevation ofthe same,'shown on a smaller scale. Figs. 3 and tare sections taken onthe lines so a; and y 3 respectively, of Fig. l.

The same reference characters indicate the same parts in all the views.

Let the numeral 5 designate the smokestaek proper, which is providedwith cinderescape openings 5'- at the bottom communicating with aconduit 7, leading downwardly on each side of the locomotive for thepurpose of discharging the arrested cinders so near the ground or trackthat they will settle or lodge thereon, thus preventing the annoyanceordinarily incident to cinders on railways. 7

Within the stack 5 is located a tube 6, which extends upwardly from thebottom of the stack, preferablytapering from the bottom toward the topto increase the draft, the said tube being smallest at its upperextremity. The lower extremity or base of the tube stack proper, intowhich chamber the arrested cinders will drop previous to their escape atthe bottom through the openings 5 into the downwardly-extending conduit7.

Located in the stack at a suitable distance above the top of the tubeGis the cinder-arrester proper, consisting, preferably, of aninverted'saucer-shaped device 9, having a central downwardly-projectingconvex surface. This device isof' somewhat greater diameter than the topof the tube 6 to insure the dropping of the cinders into the chamber 8below. This arrester or deflector may be mounted on the stackin anysuitable manner. As shown in the drawingsfthis device is attached to anarrows trip of metal 10, whose extremities are screwed to theinner wallof the stack. The area of the part 9 is such as to permit ample room forI draft therearound and to perform at the same time the spark and cinderarresting function, as aforesaid.

If desired, an additional arrester and cinder-chamber may be providedabove the one already described, though it is believed that the greaterportion, if not all, of the cinders will be caught in the lower chamber.

In the drawings I have shown an additional tube (designated 6) insertedin the stack and attached thereto above the arrester 9. This tube issimilar to the tube 6; but it is preferably of uniform diameter. Achamber 8 is formed between the tube 6 and the upper portion of thestack. A cinder and spark arrester composed of parts 9 and 10 is locatedin the stack above the tube 6 and is of the same construction as thelower arrester, already described. The cinders which engage the upperarrester are deflected downwardly into the bottom of the chamber S andescape through openings 5 into an annular compartment 12, formed aroundthe stack by a housin g 13. top and communicates at the bottom with theupper extremity-0f the downwardly-extend ing conduit 7, alreadydescribed. When the tube 6 and the arrester above it are not employed,the conduit 7 will be closed immediately above the opening 5. Thehousing 13 is merely an extension of the conduit 7 for This compartment12 is closed at the 7 my improved devicewillbe readily understood. Thecinders and sparks which enter the stack from the locomotive-furnacepass upwardly through the tube 6 and engaging the arrester above aredirected downwardly into the chamber 8, where the cinders escape at thebottom through the openings 5 If any cinders escape the first arrester,they will be caught by the second or that above the tube 6 and carrieddownwardly into the chamber 8 and thence through openings 5 into thecompartment 12 and thence by way of the conduit 7 to the ground.

Having thus described my invention, what I claim is 1. The combinationof a locomotive smokestack provided with cinder-escape openings at thebottom, a conduit leading downwardly therefrom on each side of thelocomotive, a tube extending upwardly into the stack, the bottom ofthetube having a flange extending outwardly forming the bottom for achamber between the tube and the stack proper, and an arrester devicelocated in the stack a suitable distance above the top of the tube,substantially as described.

2. The combination of a locomotive smokestack provided withcinder-escape openings at the bottom, a conduit leading downwardlytherefrom on each side of the locomotive, a tube extending upwardlywithin the stack, the bottom of the tube having a flange extendingoutwardly forming the bottom of a chamber between the tube and thestack, an arrester device located in the stack a suitable distance abovethe top of the tube, an additional tube inserted in the stack above thearrester, and having an oftset at its bottom partly closing a portion ofthe stack below andforming the bottom of a chamber-between thelast-named tube and the upper part of the stack, openings being formedaround the lower portion of the upper part of the stack,

a housing surrounding the stack and communicating at its lower extremitywith the aforesaid downwardly-leading conduits, the top of the housingbeing closed around the stack above the openings in the bottom of theupper chamber, and a spark-arrester located in the stack above the uppertube.

3. The combination of a locomotive smokestack provided withcinder-escape openings at the bottom, a tube extending upwardly withinthe stack, the bottom of the tube having a flange extending outwardlyforming the bottom of a chamber between the tube and the lower part ofthe stack, andan arrester device located in the stack a suitabledistance above the top of the tube.

4. The combination of a locomotive smokestack provided withcinder-escape openings around its bottom, a tube extending upwardlywithin the stack, the bottom of the tube having a flange extendingoutwardly forming the bottom of a chamber between the tube and the lowerpart of the stack, the said tube receiving at the bottom the products ofcombustion from the furnace or fire-box, an arrester device located inthe stack a suitable distance above the top of the tube, an'additionaltube inserted in the stack above the arrester and having an offset atits bot-tom partly closing aportion of the stack below, and forming thebottom of a chamber between the last-named tubeand the upper part of thestack, openings around the lower portion of the upper part of thestack,-a housing surrounding the stack and communicating with its outletat the bottom, the top of the housing being closed around the stackabove the outlet-openings of the upper chamber, sub stantially asdescribed.

In. testimony whereof I aflix my signature in presence of two witnesses.

LOUIS C. LAURENT.

Witnesses:

DENA NELsoN, A. J. OBRIEN.

